Black Copper Marans cockerel or pullet??

I have two BCMs around 11 weeks old. One of them has always been huge and looks
different to me. It has enormous legs, a copper neck & the feathering on its
face looks different. However, the saddle feathers look rounded to me. The
smaller one is just starting to get some coppery tones on her neck, but I feel
pretty sure she's a pullet. Any idea from this photo? Thx!